Extract configuration out of Env

spec/core/ConfigurationSpec.js

@@ -0,0 +1,134 @@
+describe('Configuration', function() {
+  const standardBooleanKeys = [
+    'random',
+    'stopOnSpecFailure',
+    'stopSpecOnExpectationFailure',
+    'failSpecWithNoExpectations',
+    'hideDisabled',
+    'autoCleanClosures',
+    'forbidDuplicateNames',
+    'detectLateRejectionHandling'
+  ];
+  const allKeys = [
+    ...standardBooleanKeys,
+    'seed',
+    'specFilter',
+    'verboseDeprecations'
+  ];
+  Object.freeze(standardBooleanKeys);
+  Object.freeze(allKeys);
+
+  it('provides defaults', function() {
+    const subject = new jasmineUnderTest.Configuration();
+    expect(subject.random).toEqual(true);
+    expect(subject.seed).toBeNull();
+    expect(subject.stopOnSpecFailure).toEqual(false);
+    expect(subject.stopSpecOnExpectationFailure).toEqual(false);
+    expect(subject.failSpecWithNoExpectations).toEqual(false);
+    expect(subject.specFilter).toEqual(jasmine.any(Function));
+    expect(subject.specFilter()).toEqual(true);
+    expect(subject.hideDisabled).toEqual(false);
+    expect(subject.autoCleanClosures).toEqual(true);
+    expect(subject.forbidDuplicateNames).toEqual(false);
+    expect(subject.verboseDeprecations).toEqual(false);
+    expect(subject.detectLateRejectionHandling).toEqual(false);
+  });
+
+  describe('copy()', function() {
+    it('returns a copy of the configuration as a plain old JS object', function() {
+      const subject = new jasmineUnderTest.Configuration();
+
+      const copy = subject.copy();
+
+      expect(copy.constructor.name).toEqual('Object');
+
+      expect(new Set(Object.keys(copy))).toEqual(new Set(allKeys));
+      for (const k of allKeys) {
+        expect(copy[k]).toEqual(subject[k]);
+      }
+    });
+  });
+
+  describe('update()', function() {
+    it('does not update properties that are absent from the parameter', function() {
+      const subject = new jasmineUnderTest.Configuration();
+      const originalValues = subject.copy();
+
+      subject.update({});
+      expect(subject.copy()).toEqual(originalValues);
+    });
+
+    function booleanPropertyBehavior(key) {
+      it('does not update the property if the specified value is undefined', function() {
+        const subject = new jasmineUnderTest.Configuration();
+        const orig = subject[key];
+
+        subject.update({ [key]: undefined });
+
+        expect(subject[key]).toEqual(orig);
+      });
+
+      it('updates the property if the specified value is not undefined', function() {
+        const subject = new jasmineUnderTest.Configuration();
+        const orig = subject[key];
+
+        subject.update({ [key]: !orig });
+        expect(subject[key]).toEqual(!orig);
+
+        subject.update({ [key]: orig });
+        expect(subject[key]).toEqual(orig);
+      });
+    }
+
+    for (const k of standardBooleanKeys) {
+      describe(k, function() {
+        booleanPropertyBehavior(k);
+      });
+    }
+
+    // TODO: in the next major release, treat verboseDeprecations like other booleans
+    it('sets verboseDeprecations when present', function() {
+      const subject = new jasmineUnderTest.Configuration();
+      const orig = subject.verboseDeprecations;
+
+      subject.update({ verboseDeprecations: !orig });
+      expect(subject.verboseDeprecations).toEqual(!orig);
+
+      subject.update({ verboseDeprecations: orig });
+      expect(subject.verboseDeprecations).toEqual(orig);
+
+      // For backwards compatibility, explicitly setting to undefined should
+      // work. Undefined isn't officially valid but gets treated like false.
+      subject.update({ verboseDeprecations: undefined });
+      expect(subject.verboseDeprecations).toBeUndefined();
+    });
+
+    it('sets specFilter when truthy', function() {
+      const subject = new jasmineUnderTest.Configuration();
+      const orig = subject.specFilter;
+
+      subject.update({ specFilter: undefined });
+      expect(subject.specFilter).toBe(orig);
+
+      subject.update({ specFilter: false });
+      expect(subject.specFilter).toBe(orig);
+
+      function newSpecFilter() {}
+      subject.update({ specFilter: newSpecFilter });
+      expect(subject.specFilter).toBe(newSpecFilter);
+    });
+
+    it('sets seed when not undefined', function() {
+      const subject = new jasmineUnderTest.Configuration();
+
+      subject.update({ seed: undefined });
+      expect(subject.seed).toBeNull();
+
+      subject.update({ seed: 1234 });
+      expect(subject.seed).toEqual(1234);
+
+      subject.update({ seed: null });
+      expect(subject.seed).toBeNull();
+    });
+  });
+});