test prettier configuration behavior

lib-extra/src/test/java/com/diffplug/spotless/extra/npm/PrettierFormatterStepTest.java

@@ -83,7 +83,43 @@ public void parserInferenceIsWorking() throws Exception {
 				stepHarness.testResource(dirtyFile, cleanFile);
 			}
 		}
-
 	}
 
+	@Category(NpmTest.class)
+	public static class PrettierFormattingOptionsAreWorking extends NpmFormatterStepCommonTests {
+
+		private static final String FILEDIR = "npm/prettier/config/";
+
+		public void runFormatTest(PrettierConfig config, String cleanFileNameSuffix) throws Exception {
+
+			final String dirtyFile = FILEDIR + "typescript.dirty";
+			final String cleanFile = FILEDIR + "typescript." + cleanFileNameSuffix + ".clean";
+
+			final FormatterStep formatterStep = PrettierFormatterStep.create(
+					TestProvisioner.mavenCentral(),
+					buildDir(),
+					npmExecutable(),
+					config); // should select parser based on this name
+
+			try (StepHarness stepHarness = StepHarness.forStep(formatterStep)) {
+				stepHarness.testResource(dirtyFile, cleanFile);
+			}
+		}
+
+		@Test
+		public void defaultsAreApplied() throws Exception {
+			runFormatTest(new PrettierConfig(null, ImmutableMap.of("parser", "typescript")), "defaults");
+		}
+
+		@Test
+		public void configFileOptionsAreApplied() throws Exception {
+			runFormatTest(new PrettierConfig(createTestFile(FILEDIR + ".prettierrc.yml"), null), "configfile");
+		}
+
+		@Test
+		public void configFileOptionsCanBeOverriden() throws Exception {
+			runFormatTest(new PrettierConfig(createTestFile(FILEDIR + ".prettierrc.yml"), ImmutableMap.of("printWidth", 300)), "override");
+		}
+
+	}
 }

lib-extra/src/test/resources/npm/prettier/config/.prettierrc.yml

@@ -0,0 +1,2 @@
+parser: typescript
+printWidth: 50

lib-extra/src/test/resources/npm/prettier/config/typescript.configfile.clean

@@ -0,0 +1,15 @@
+export class MyVeryOwnControllerWithARatherLongNameThatIsNotReallyNecessary
+  extends AbstractController
+  implements DisposeAware, CallbackAware {
+  public myValue: string[];
+
+  constructor(
+    private myService: Service,
+    name: string,
+    private field: any
+  ) {
+    super(name);
+  }
+
+  //...
+}

lib-extra/src/test/resources/npm/prettier/config/typescript.defaults.clean

@@ -0,0 +1,11 @@
+export class MyVeryOwnControllerWithARatherLongNameThatIsNotReallyNecessary
+  extends AbstractController
+  implements DisposeAware, CallbackAware {
+  public myValue: string[];
+
+  constructor(private myService: Service, name: string, private field: any) {
+    super(name);
+  }
+
+  //...
+}

lib-extra/src/test/resources/npm/prettier/config/typescript.dirty

@@ -0,0 +1,10 @@
+export class MyVeryOwnControllerWithARatherLongNameThatIsNotReallyNecessary extends AbstractController implements DisposeAware, CallbackAware {
+
+
+public myValue:string[];
+
+constructor(private myService:Service,name:string,private field:any){ super(name)   ;}
+
+
+//...
+}

lib-extra/src/test/resources/npm/prettier/config/typescript.override.clean

@@ -0,0 +1,9 @@
+export class MyVeryOwnControllerWithARatherLongNameThatIsNotReallyNecessary extends AbstractController implements DisposeAware, CallbackAware {
+  public myValue: string[];
+
+  constructor(private myService: Service, name: string, private field: any) {
+    super(name);
+  }
+
+  //...
+}