Increase test coverage (#175)

* Increase test coverage

* Test for error when binding `this` in destructuring pattern

* Ignore coverage of inAsync check in parseAwait - already checked externally

* Ignore coverage of default case in checkPropClash

* Remove unused parameter isAsync from parseParenAndDistinguishExpression

* Ignore coverage of an `else` branch in flowParseTypeParameterDeclaration

* Flow: remove unused parameters to flowParseTypeAnnotatableIdentifier

* Flow: ignore coverage of pass-through throw statement in parseConditional

* Flow: Add test for error on property with type param

* Flow: ignore coverage of pass-through throw statements in parseMaybeAssign, parseArrow

* Add test for error on XML-style comment in module code

* Update test for error on method in object pattern

* Test for error: "Only '=' operator can be used for specifying default value"

test/fixtures/core/categorized/label-kind-switch/actual.js

@@ -0,0 +1,4 @@
+{
+  a: switch (i) {
+  }
+}

test/fixtures/core/categorized/label-kind-switch/expected.json

@@ -0,0 +1,117 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 25,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 4,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 25,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 4,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "BlockStatement",
+        "start": 0,
+        "end": 25,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 4,
+            "column": 1
+          }
+        },
+        "body": [
+          {
+            "type": "LabeledStatement",
+            "start": 4,
+            "end": 23,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 2
+              },
+              "end": {
+                "line": 3,
+                "column": 3
+              }
+            },
+            "body": {
+              "type": "SwitchStatement",
+              "start": 7,
+              "end": 23,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 5
+                },
+                "end": {
+                  "line": 3,
+                  "column": 3
+                }
+              },
+              "discriminant": {
+                "type": "Identifier",
+                "start": 15,
+                "end": 16,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 13
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 14
+                  },
+                  "identifierName": "i"
+                },
+                "name": "i"
+              },
+              "cases": []
+            },
+            "label": {
+              "type": "Identifier",
+              "start": 4,
+              "end": 5,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 3
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            }
+          }
+        ],
+        "directives": []
+      }
+    ],
+    "directives": []
+  }
+}

test/fixtures/core/categorized/malformed-switch/actual.js

@@ -0,0 +1,3 @@
+switch (x) {
+  var y = 5;
+}

test/fixtures/core/categorized/malformed-switch/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (2:2)"
+}