assert(a === b) => assert.strictEqual(a, b)

When the test fails, we are getting actual
values in the error message instead of

+ true
= false

test/api.js

@@ -956,26 +956,25 @@ describe('api', function() {
         data: 'div { color: foo(bar(null)); background-color: baz("foo" == "bar"); }',
         functions: {
           foo: function(a) {
-            assert.ok(
-              'Supplied value should be the same instance as sass.TRUE',
-              a === sass.TRUE
+            assert.strictEqual(a, sass.TRUE,
+              'Supplied value should be the same instance as sass.TRUE'
             );
 
-            assert.ok(
-              'sass.types.Boolean(true) should return a singleton',
-              sass.types.Boolean(true) === sass.types.Boolean(true) &&
-              sass.types.Boolean(true) === sass.TRUE
-            );
+            assert.strictEqual(
+              sass.types.Boolean(true), sass.types.Boolean(true),
+              'sass.types.Boolean(true) should return a singleton');
+
+            assert.strictEqual(
+              sass.types.Boolean(true), sass.TRUE,
+              'sass.types.Boolean(true) should be the same instance as sass.TRUE');
 
             counter++;
 
             return sass.types.String('foo');
           },
           bar: function(a) {
-            assert.ok(
-              'Supplied value should be the same instance as sass.NULL',
-              a === sass.NULL
-            );
+            assert.strictEqual(a, sass.NULL, 
+                'Supplied value should be the same instance as sass.NULL');
 
             assert.throws(function() {
               return new sass.types.Null();
@@ -986,20 +985,20 @@ describe('api', function() {
             return sass.TRUE;
           },
           baz: function(a) {
-            assert.ok(
-              'Supplied value should be the same instance as sass.FALSE',
-              a === sass.FALSE
-            );
+            assert.strictEqual(a, sass.FALSE,
+              'Supplied value should be the same instance as sass.FALSE');
 
             assert.throws(function() {
               return new sass.types.Boolean(false);
             }, /Cannot instantiate SassBoolean/);
 
-            assert.ok(
-              'sass.types.Boolean(false) should return a singleton',
-              sass.types.Boolean(false) === sass.types.Boolean(false) &&
-              sass.types.Boolean(false) === sass.FALSE
-            );
+            assert.strictEqual(
+              sass.types.Boolean(false), sass.types.Boolean(false),
+              'sass.types.Boolean(false) should return a singleton');
+
+            assert.strictEqual(
+              sass.types.Boolean(false), sass.FALSE,
+              'sass.types.Boolean(false) should return singleton identical to sass.FALSE');
 
             counter++;
 
@@ -1007,7 +1006,7 @@ describe('api', function() {
           }
         }
       }, function() {
-        assert.ok(counter === 3);
+        assert.strictEqual(counter, 3);
         done();
       });
     });
@@ -1021,7 +1020,7 @@ describe('api', function() {
         file: fixture('include-files/index.scss')
       }, function(error, result) {
         assert(!error);
-        assert(typeof result.stats.start === 'number');
+        assert.strictEqual(typeof result.stats.start, 'number');
         assert(result.stats.start >= start);
         done();
       });
@@ -1032,7 +1031,7 @@ describe('api', function() {
         file: fixture('include-files/index.scss')
       }, function(error, result) {
         assert(!error);
-        assert(typeof result.stats.end === 'number');
+        assert.strictEqual(typeof result.stats.end, 'number');
         assert(result.stats.end >= result.stats.start);
         done();
       });
@@ -1043,7 +1042,7 @@ describe('api', function() {
         file: fixture('include-files/index.scss')
       }, function(error, result) {
         assert(!error);
-        assert(typeof result.stats.duration === 'number');
+        assert.strictEqual(typeof result.stats.duration, 'number');
         assert.equal(result.stats.end - result.stats.start, result.stats.duration);
         done();
       });
@@ -1504,19 +1503,19 @@ describe('api', function() {
     });
 
     it('should provide a start timestamp', function(done) {
-      assert(typeof result.stats.start === 'number');
+      assert.strictEqual(typeof result.stats.start, 'number');
       assert(result.stats.start >= start);
       done();
     });
 
     it('should provide an end timestamp', function(done) {
-      assert(typeof result.stats.end === 'number');
+      assert.strictEqual(typeof result.stats.end, 'number');
       assert(result.stats.end >= result.stats.start);
       done();
     });
 
     it('should provide a duration', function(done) {
-      assert(typeof result.stats.duration === 'number');
+      assert.strictEqual(typeof result.stats.duration, 'number');
       assert.equal(result.stats.end - result.stats.start, result.stats.duration);
       done();
     });

test/cli.js

@@ -244,7 +244,7 @@ describe('cli', function() {
 
       bin.stderr.setEncoding('utf8');
       bin.stderr.once('data', function(data) {
-        assert(data.trim() === '=> changed: ' + src);
+        assert.strictEqual(data.trim(), '=> changed: ' + src);
         fs.unlinkSync(src);
         bin.kill();
         done();
@@ -290,7 +290,7 @@ describe('cli', function() {
 
       bin.stdout.setEncoding('utf8');
       bin.stdout.once('data', function(data) {
-        assert(data.trim() === 'body{background:white}');
+        assert.strictEqual(data.trim(), 'body{background:white}');
         fs.unlinkSync(src);
         bin.kill();
         done();
@@ -314,7 +314,7 @@ describe('cli', function() {
 
       bin.stdout.setEncoding('utf8');
       bin.stdout.once('data', function(data) {
-        assert.equal(data.trim(), 'body{background:blue}');
+        assert.strictEqual(data.trim(), 'body{background:blue}');
         bin.kill();
         done();
       });
@@ -337,7 +337,7 @@ describe('cli', function() {
 
       bin.stdout.setEncoding('utf8');
       bin.stdout.once('data', function(data) {
-        assert.equal(data.trim(), 'body{background:red}');
+        assert.strictEqual(data.trim(), 'body{background:red}');
         bin.kill();
         done();
       });
@@ -442,7 +442,7 @@ describe('cli', function() {
       ]);
 
       bin.once('close', function() {
-        assert(read(dest, 'utf8').indexOf('sourceMappingURL') === -1);
+        assert.strictEqual(read(dest, 'utf8').indexOf('sourceMappingURL'), -1);
         assert(fs.existsSync(map));
         fs.unlinkSync(map);
         fs.unlinkSync(dest);
@@ -570,8 +570,8 @@ describe('cli', function() {
       var bin = spawn(cli, [src]);
 
       bin.once('close', function(code) {
-        assert(code !== 0);
-        assert.equal(glob.sync(fixture('input-directory/**/*.css')).length, 0);
+        assert.notStrictEqual(code, 0);
+        assert.strictEqual(glob.sync(fixture('input-directory/**/*.css')).length, 0);
         done();
       });
     });
@@ -582,7 +582,7 @@ describe('cli', function() {
       var bin = spawn(cli, [src, '--output', dest]);
 
       bin.once('close', function(code) {
-        assert(code !== 0);
+        assert.notStrictEqual(code, 0);
         assert.equal(glob.sync(fixture('input-directory/**/*.css')).length, 0);
         done();
       });
@@ -745,7 +745,7 @@ describe('cli', function() {
       ]);
 
       bin.once('close', function(code) {
-        assert(code !== 0);
+        assert.notStrictEqual(code, 0);
         done();
       });
     });