diff --git a/.circleci/config.yml b/.circleci/config.yml
index e1d8e99..500bf72 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -29,6 +29,11 @@ commands:
           root: .
           paths:
             - node_modules/
+  install_maven:
+    description: Install maven
+    steps:
+      - run: apt-get update
+      - run: apt-get install -y maven
   checkout_and_merge:
     steps:
       - checkout
@@ -49,6 +54,7 @@ jobs:
     <<: *defaults
     steps:
       - install_deps
+      - install_maven
   lint:
     <<: *defaults
     steps:
diff --git a/lib/call-graph.ts b/lib/call-graph.ts
index 9078466..610502a 100644
--- a/lib/call-graph.ts
+++ b/lib/call-graph.ts
@@ -1,10 +1,11 @@
 import { Graph } from 'graphlib';
 import { removeParams, toFQclassName } from './class-parsing';
+import { CallGraphNode } from './types';
 
 function getNodeLabel(
   functionCall: string,
   classPerJarMapping: { [index: string]: string },
-): {} {
+): CallGraphNode {
   // com.ibm.wala.FakeRootClass:fakeRootMethod
   const [className, functionName] = functionCall.split(':');
   const jarName = classPerJarMapping[className];
diff --git a/lib/types.ts b/lib/types.ts
new file mode 100644
index 0000000..655b957
--- /dev/null
+++ b/lib/types.ts
@@ -0,0 +1,5 @@
+export interface CallGraphNode {
+  className: string;
+  functionName: string;
+  jarName: string;
+}
diff --git a/package.json b/package.json
index 3e56cc0..81dc760 100644
--- a/package.json
+++ b/package.json
@@ -7,8 +7,9 @@
     "format": "prettier --write '{lib,test}/**/*.{js,ts,json,yml}'",
     "lint": "npm run format:check && npm run lint:eslint",
     "lint:eslint": "eslint --color --cache 'lib/**/*.{js,ts}'",
-    "test": "npm run lint && npm run test:unit",
-    "test:unit": "jest",
+    "test": "npm run lint && npm run test:unit && npm run test:system",
+    "test:unit": "jest unit",
+    "test:system": "jest system",
     "test:coverage": "npm run test:unit -- --coverage",
     "test:watch": "tsc-watch --onSuccess 'npm run test:unit'",
     "build": "tsc",
diff --git a/test/fixtures/java-project-integration-test/pom.xml b/test/fixtures/java-project-integration-test/pom.xml
new file mode 100644
index 0000000..f48f1c5
--- /dev/null
+++ b/test/fixtures/java-project-integration-test/pom.xml
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>cy.alavrov</groupId>
+    <artifactId>JMinerGuide</artifactId>
+    <version>0.2.0-DEVELOPMENT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.7</maven.compiler.source>
+        <maven.compiler.target>1.7</maven.compiler.target>
+    </properties>
+    <name>JMinerGuide</name>
+    <build>
+        <finalName>JMinerGuide</finalName>
+        <plugins>                            
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <version>2.4.1</version>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <directory>dist</directory>
+                            <followSymlinks>false</followSymlinks>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
+                    
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.4</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>lib/</classpathPrefix>
+                            <useUniqueVersions>false</useUniqueVersions>
+                            <mainClass>cy.alavrov.jminerguide.App</mainClass>
+                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
+                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+            
+            <plugin>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>install</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/../dist/lib/</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-resources-plugin</artifactId>
+                <version>2.5</version>
+                <executions>
+                    <execution>
+                        <id>copy-exec</id>
+                        <phase>install</phase>
+                        <goals>
+                            <goal>copy-resources</goal>
+                        </goals>
+                        <configuration>
+                        <outputDirectory>${project.build.directory}/../dist/</outputDirectory>
+                        <resources>          
+                            <resource>
+                                <directory>${project.build.directory}</directory>
+                                <includes>
+                                    <include>${project.build.finalName}.${project.packaging}</include>
+                                </includes>
+                            </resource>        
+                        </resources>              
+                        </configuration>            
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+                <includes>
+                    <include>*.properties</include>
+                </includes>
+            </resource>   
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>false</filtering>
+                <excludes>
+                    <exclude>*.properties</exclude>
+                </excludes>
+            </resource>            
+        </resources>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>net.java.dev.jna</groupId>
+            <artifactId>jna</artifactId>
+            <version>4.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>net.java.dev.jna</groupId>
+            <artifactId>jna-platform</artifactId>
+            <version>4.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jdesktop</groupId>
+            <artifactId>beansbinding</artifactId>
+            <version>1.2.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jdom</groupId>
+            <artifactId>jdom2</artifactId>
+            <version>2.0.5</version>
+        </dependency>   
+        <dependency>     
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpclient</artifactId>
+            <version>4.3.1</version>
+        </dependency>                             
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.4</version>
+        </dependency>
+        <dependency>
+            <groupId>joda-time</groupId>
+            <artifactId>joda-time</artifactId>
+            <version>2.6</version>
+        </dependency>    
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/test/fixtures/java-project-integration-test/target/classes/app.properties b/test/fixtures/java-project-integration-test/target/classes/app.properties
new file mode 100644
index 0000000..7ac4d1f
--- /dev/null
+++ b/test/fixtures/java-project-integration-test/target/classes/app.properties
@@ -0,0 +1 @@
+application.version=0.2.0-DEVELOPMENT
\ No newline at end of file
diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App$1.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App$1.class
new file mode 100644
index 0000000..829cd93
Binary files /dev/null and b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App$1.class differ
diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App.class
new file mode 100644
index 0000000..3fda2be
Binary files /dev/null and b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/App.class differ
diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats$1.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats$1.class
new file mode 100644
index 0000000..defeac1
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats$2.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats$2.class
new file mode 100644
index 0000000..ee2e5dc
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/CalculatedStats.class
new file mode 100644
index 0000000..4570109
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/DataContainer.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/DataContainer.class
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index 0000000..a9d866e
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ICalculatedStats.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ICalculatedStats.class
new file mode 100644
index 0000000..a57d05f
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/SimpleCalculatedStats.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/SimpleCalculatedStats.class
new file mode 100644
index 0000000..7287498
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice$CompressionType.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice$CompressionType.class
new file mode 100644
index 0000000..5209c81
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice$ItemType.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice$ItemType.class
new file mode 100644
index 0000000..f77ab4d
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPrice.class
new file mode 100644
index 0000000..4af4cbb
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPriceContainer$ItemPriceTableModel.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPriceContainer$ItemPriceTableModel.class
new file mode 100644
index 0000000..20ff8ed
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPriceContainer.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/price/ItemPriceContainer.class
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index 0000000..10485b8
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/HarvestUpgrade.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/HarvestUpgrade.class
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index 0000000..05e98f5
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Hull$1.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Hull$1.class
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index 0000000..f7baac0
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Hull.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Hull.class
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index 0000000..9d3370d
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/MiningCrystalLevel.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/MiningCrystalLevel.class
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index 0000000..34bfef9
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/MiningDrone.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/MiningDrone.class
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index 0000000..f2413fe
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Rig.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Rig.class
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index 0000000..ded6b7f
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Ship.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Ship.class
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index 0000000..3d4f086
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/ShipContainer.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/ShipContainer.class
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index 0000000..b215fae
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Turret.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/Turret.class
new file mode 100644
index 0000000..5ec3a4a
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diff --git a/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/TurretType.class b/test/fixtures/java-project-integration-test/target/classes/cy/alavrov/jminerguide/data/ship/TurretType.class
new file mode 100644
index 0000000..70d9bb2
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diff --git a/test/system/maven-call-graph.test.ts b/test/system/maven-call-graph.test.ts
new file mode 100644
index 0000000..3af8016
--- /dev/null
+++ b/test/system/maven-call-graph.test.ts
@@ -0,0 +1,33 @@
+import { getCallGraphMvn } from '../../lib';
+import * as path from 'path';
+import { CallGraphNode } from '../../lib/types';
+
+jest.setTimeout(60000);
+
+test('simple call graph', async () => {
+  const callGraph = await getCallGraphMvn(
+    path.join(__dirname, '../fixtures/java-project-integration-test'),
+  );
+
+  expect(callGraph.edgeCount()).toBeGreaterThan(0);
+  expect(callGraph.nodeCount()).toBeGreaterThan(0);
+  expect(
+    callGraph.hasNode('cy.alavrov.jminerguide.data.ship.Ship:getMaxDrones'),
+  ).toBeTruthy;
+
+  const userLandNode = callGraph.node(
+    'cy.alavrov.jminerguide.data.ship.Ship:getMaxDrones',
+  ) as CallGraphNode;
+  expect(userLandNode.className).toEqual(
+    'cy.alavrov.jminerguide.data.ship.Ship',
+  );
+  expect(userLandNode.functionName).toEqual('getMaxDrones');
+  expect(userLandNode.jarName).toBeUndefined(); // user land code doesn't have a jar
+
+  const thirdPartyNode = callGraph.node(
+    'java.util.zip.Inflater:finalize',
+  ) as CallGraphNode;
+  expect(thirdPartyNode.className).toEqual('java.util.zip.Inflater');
+  expect(thirdPartyNode.functionName).toEqual('finalize');
+  expect(thirdPartyNode.jarName).toBeUndefined(); // TODO seems like a bug
+});
diff --git a/test/lib/call-graph.test.ts b/test/unit/call-graph.test.ts
similarity index 100%
rename from test/lib/call-graph.test.ts
rename to test/unit/call-graph.test.ts
diff --git a/test/lib/fetch-snyk-java-call-graph-generator.test.ts b/test/unit/fetch-snyk-java-call-graph-generator.test.ts
similarity index 100%
rename from test/lib/fetch-snyk-java-call-graph-generator.test.ts
rename to test/unit/fetch-snyk-java-call-graph-generator.test.ts
diff --git a/test/lib/gradle-wrapper.test.ts b/test/unit/gradle-wrapper.test.ts
similarity index 100%
rename from test/lib/gradle-wrapper.test.ts
rename to test/unit/gradle-wrapper.test.ts
diff --git a/test/lib/java-wrapper.test.ts b/test/unit/java-wrapper.test.ts
similarity index 100%
rename from test/lib/java-wrapper.test.ts
rename to test/unit/java-wrapper.test.ts
diff --git a/test/lib/mvn-wrapper.test.ts b/test/unit/mvn-wrapper.test.ts
similarity index 100%
rename from test/lib/mvn-wrapper.test.ts
rename to test/unit/mvn-wrapper.test.ts