partway through messaging

aws · Jun 21, 2021 · cc29908 · cc29908
1 parent 58a837a
commit cc29908
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Showing 3 changed files with 241 additions and 183 deletions.
diff --git a/packages/@aws-cdk/assertions/lib/match.ts b/packages/@aws-cdk/assertions/lib/match.ts
@@ -1,5 +1,10 @@
 import { ABSENT } from './vendored/assert';
 
+export interface MatchFailure {
+  readonly path: string[];
+  readonly message: string;
+}
+
 /**
  * Partial and special matching during template assertions
  */
@@ -23,7 +28,7 @@ export abstract class Match {
     return x && x instanceof Match;
   }
 
-  public abstract test(actual: any): boolean;
+  public abstract test(actual: any): MatchFailure[];
 }
 
 export class ExactMatch extends Match {
@@ -35,47 +40,48 @@ export class ExactMatch extends Match {
     }
   }
 
-  public test(actual: any): boolean {
-    if (Array.isArray(actual) !== Array.isArray(this.pattern)) {
-      return false;
-    }
+  public test(actual: any): MatchFailure[] {
+    if (Array.isArray(this.pattern)) {
+      if (!Array.isArray(actual)) {
+        return [{ path: [], message: `Expected type array but received ${typeof actual}` }];
+      }
 
-    if (Array.isArray(actual)) {
       if (this.pattern.length !== actual.length) {
-        return false;
+        return [{ path: [], message: `Expected array of length ${this.pattern.length} but received ${actual.length}` }];
       }
 
+      const failures: MatchFailure[] = [];
       for (let i = 0; i < this.pattern.length; i++) {
         const p = this.pattern[i];
         const matcher = Match.isMatcher(p) ? p : new ExactMatch(p);
-        if (!matcher.test(actual[i])) return false;
+        const innerFailures = matcher.test(actual[i]);
+        failures.push(...composeFailures(`[${i}]`, innerFailures));
       }
 
-      return true;
-    }
-
-    if ((typeof actual === 'object') !== (typeof this.pattern === 'object')) {
-      return false;
+      return failures;
     }
 
     if (typeof this.pattern === 'object') {
-      const patternKeys = Object.keys(this.pattern).sort();
-      const actualKeys = Object.keys(actual).sort();
+      if (Array.isArray(actual)) {
+        return [{ path: [], message: 'Expected type object but received array' }];
+      }
 
-      const sameKeys = new ExactMatch(patternKeys).test(actualKeys);
-      if (!sameKeys) return false;
+      if (typeof actual !== 'object') {
+        return [{ path: [], message: `Expected type object but received ${typeof actual}` }];
+      }
 
-      const objectMatch = new ObjectLikeMatch(this.pattern).test(actual);
-      if (!objectMatch) return false;
+      return new ObjectLikeMatch(this.pattern, { exact: true }).test(actual);
+    }
 
-      return true;
+    if (typeof this.pattern !== typeof actual) {
+      return [{ path: [], message: `Expected type ${typeof this.pattern} but received ${getType(actual)}` }];
     }
 
     if (actual !== this.pattern) {
-      return false;
+      return [{ path: [], message: `Expected ${this.pattern} but received ${actual}` }];
     }
 
-    return true;
+    return [];
   }
 }
 
@@ -84,9 +90,9 @@ export class ArrayWithMatch extends Match {
     super();
   }
 
-  public test(actual: any): boolean {
-    if (!Array.isArray(actual)) return false;
-    if (this.pattern.length > actual.length) return false;
+  public test(actual: any): MatchFailure[] {
+    if (!Array.isArray(actual)) return [{ path: [], message: 'FIXME' }];
+    if (this.pattern.length > actual.length) return [{ path: [], message: 'FIXME' }];
 
     let patternIdx = 0;
     let actualIdx = 0;
@@ -103,26 +109,60 @@ export class ArrayWithMatch extends Match {
     }
 
     if (patternIdx === this.pattern.length) {
-      return true;
+      return [];
     }
-    return false;
+    return [{ path: [], message: 'FIXME' }];
   }
 }
 
+export interface ObjectLikeMatchOptions {
+  readonly exact?: boolean;
+}
+
 export class ObjectLikeMatch extends Match {
-  constructor(private readonly pattern: {[key: string]: any}) {
+  private readonly exact: boolean;
+  constructor(
+    private readonly pattern: {[key: string]: any},
+    options: ObjectLikeMatchOptions = {}) {
+
     super();
+    this.exact = options.exact ?? false;
   }
 
-  public test(actual: any): boolean {
-    if (typeof actual !== 'object') return false;
+  public test(actual: any): MatchFailure[] {
+    if (typeof actual !== 'object') {
+      return [{ path: [], message: `Expected type object but received ${getType(actual)}` }];
+    }
+
+    const failures: MatchFailure[] = [];
+    if (this.exact) {
+      for (const a of Object.keys(actual)) {
+        if (!(a in this.pattern)) {
+          failures.push({ path: [], message: `Unexpected key '${a}'` });
+        }
+      }
+    }
 
     for (const [patternKey, patternVal] of Object.entries(this.pattern)) {
-      if (!(patternKey in actual)) return false;
+      if (!(patternKey in actual)) {
+        failures.push({ path: [], message: `Missing key '${patternKey}'` });
+        continue;
+      }
       const matcher = Match.isMatcher(patternVal) ? patternVal : new ExactMatch(patternVal);
-      if (!matcher.test(actual[patternKey])) return false;
+      const innerFailures = matcher.test(actual[patternKey]);
+      failures.push(...composeFailures(`/${patternKey}`, innerFailures));
     }
 
-    return true;
+    return failures;
   }
+}
+
+function getType(obj: any): string {
+  return Array.isArray(obj) ? 'array' : typeof obj;
+}
+
+function composeFailures(relativePath: string, inner: MatchFailure[]): MatchFailure[] {
+  return inner.map(f => {
+    return { path: [relativePath, ...f.path], message: f.message };
+  });
 }
diff --git a/packages/@aws-cdk/assertions/test/assertions.test.ts b/packages/@aws-cdk/assertions/test/assertions.test.ts
@@ -1,6 +1,7 @@
+/* eslint-disable jest/no-commented-out-tests */
 import { CfnResource, Stack } from '@aws-cdk/core';
 import { Construct } from 'constructs';
-import { Match, TemplateAssertions } from '../lib';
+import { TemplateAssertions } from '../lib';
 
 describe('StackAssertions', () => {
   describe('fromString', () => {
@@ -136,63 +137,63 @@ describe('StackAssertions', () => {
     });
   });
 
-  describe('hasResource', () => {
-    test('exact match', () => {
-      const stack = new Stack();
-      new CfnResource(stack, 'Foo', {
-        type: 'Foo::Bar',
-        properties: { baz: 'qux' },
-      });
-
-      const inspect = TemplateAssertions.fromStack(stack);
-      inspect.hasResource('Foo::Bar', {
-        Properties: { baz: 'qux' },
-      });
-
-      expect(() => inspect.hasResource('Foo::Bar', {
-        Properties: { baz: 'waldo' },
-      })).toThrow('MYERROR');
-
-      expect(() => inspect.hasResource('Foo::Bar', {
-        Properties: { baz: 'qux', fred: 'waldo' },
-      })).toThrow('MYERROR');
-    });
-
-    test('arrayWith', () => {
-      const stack = new Stack();
-      new CfnResource(stack, 'Foo', {
-        type: 'Foo::Bar',
-        properties: { baz: ['qux', 'quy'] },
-      });
-
-      const inspect = TemplateAssertions.fromStack(stack);
-      inspect.hasResource('Foo::Bar', {
-        Properties: { baz: Match.arrayWith(['qux']) },
-      });
-
-      expect(() => inspect.hasResource('Foo::Bar', {
-        Properties: { baz: Match.arrayWith(['waldo']) },
-      })).toThrow('MYERROR');
-    });
-
-    test('objectLike', () => {
-      const stack = new Stack();
-      new CfnResource(stack, 'Foo', {
-        type: 'Foo::Bar',
-        properties: { baz: 'qux', fred: 'waldo' },
-      });
-
-      const inspect = TemplateAssertions.fromStack(stack);
-      inspect.hasResource('Foo::Bar', {
-        Properties: Match.objectLike({ baz: 'qux' }),
-      });
-      inspect.hasResource('Foo::Bar', {
-        Properties: Match.objectLike({ fred: 'waldo' }),
-      });
-
-      expect(() => inspect.hasResource('Foo::Bar', {
-        Properties: Match.objectLike({ baz: 'waldo' }),
-      })).toThrow('MYERROR');
-    });
-  });
+  // describe('hasResource', () => {
+  //   test('exact match', () => {
+  //     const stack = new Stack();
+  //     new CfnResource(stack, 'Foo', {
+  //       type: 'Foo::Bar',
+  //       properties: { baz: 'qux' },
+  //     });
+
+  //     const inspect = TemplateAssertions.fromStack(stack);
+  //     inspect.hasResource('Foo::Bar', {
+  //       Properties: { baz: 'qux' },
+  //     });
+
+  //     expect(() => inspect.hasResource('Foo::Bar', {
+  //       Properties: { baz: 'waldo' },
+  //     })).toThrow('MYERROR');
+
+  //     expect(() => inspect.hasResource('Foo::Bar', {
+  //       Properties: { baz: 'qux', fred: 'waldo' },
+  //     })).toThrow('MYERROR');
+  //   });
+
+  //   test('arrayWith', () => {
+  //     const stack = new Stack();
+  //     new CfnResource(stack, 'Foo', {
+  //       type: 'Foo::Bar',
+  //       properties: { baz: ['qux', 'quy'] },
+  //     });
+
+  //     const inspect = TemplateAssertions.fromStack(stack);
+  //     inspect.hasResource('Foo::Bar', {
+  //       Properties: { baz: Match.arrayWith(['qux']) },
+  //     });
+
+  //     expect(() => inspect.hasResource('Foo::Bar', {
+  //       Properties: { baz: Match.arrayWith(['waldo']) },
+  //     })).toThrow('MYERROR');
+  //   });
+
+  //   test('objectLike', () => {
+  //     const stack = new Stack();
+  //     new CfnResource(stack, 'Foo', {
+  //       type: 'Foo::Bar',
+  //       properties: { baz: 'qux', fred: 'waldo' },
+  //     });
+
+  //     const inspect = TemplateAssertions.fromStack(stack);
+  //     inspect.hasResource('Foo::Bar', {
+  //       Properties: Match.objectLike({ baz: 'qux' }),
+  //     });
+  //     inspect.hasResource('Foo::Bar', {
+  //       Properties: Match.objectLike({ fred: 'waldo' }),
+  //     });
+
+  //     expect(() => inspect.hasResource('Foo::Bar', {
+  //       Properties: Match.objectLike({ baz: 'waldo' }),
+  //     })).toThrow('MYERROR');
+  //   });
+  // });
 });