Separate elm src and add unit tests

In order to add a test for
rtfeldman#336, this commit
moves all elm source files from `//src` to `//elm/src`.

A unit test has also been added at `//elm/tests/`.
The `//elm/elm.json` file is used when generating the source and for
running unit tests.
There is still `//elm.json` but this is now used only by
`//tests/ci.json`.

elm.json

@@ -1,15 +1,10 @@
 {
     "type": "application",
-    "source-directories": [
-        "src"
-    ],
+    "source-directories": [],
     "elm-version": "0.19.0",
     "dependencies": {
         "direct": {
-            "elm/core": "1.0.0",
-            "elm/json": "1.0.0",
-            "elm/random": "1.0.0",
-            "elm/time": "1.0.0"
+            "elm/core": "1.0.0"
         },
         "indirect": {}
     },

elm/.gitignore

@@ -0,0 +1 @@
+elm-stuff/

elm/elm.json

@@ -0,0 +1,25 @@
+{
+    "type": "application",
+    "source-directories": [
+        "src"
+    ],
+    "elm-version": "0.19.0",
+    "dependencies": {
+        "direct": {
+            "elm/core": "1.0.0",
+            "elm/json": "1.0.0",
+            "elm/random": "1.0.0",
+            "elm/time": "1.0.0"
+        },
+        "indirect": {}
+    },
+    "test-dependencies": {
+        "direct": {
+            "elm-explorations/test": "1.2.0"
+        },
+        "indirect": {
+            "elm/html": "1.0.0",
+            "elm/virtual-dom": "1.0.2"
+        }
+    }
+}

elm/tests/Test/Reporter/Console/FormatTest.elm

@@ -0,0 +1,62 @@
+module Test.Reporter.Console.FormatTest exposing (suite)
+
+import Test exposing (..)
+import Expect
+import Test.Reporter.Console.Format exposing (highlightEqual)
+
+suite : Test
+suite = describe "highlightEqual"
+    [ describe "strings that should *not* be highlighted"
+        [ describe "very different strings"
+            [ test "Two strings which are *just* too different for high" <|
+                \() ->
+                    let
+                        expected =
+                            "Err { context = \"Explanation of what went so wrong\", description = \"An error\" }"
+
+                        actual =
+                            "Ok \"Success.\""
+                    in
+                        highlightEqual expected actual
+                            |> Expect.equal Nothing
+            , test "A string containing another string interpersed with other characters" <|
+                \() ->
+                    let
+                        expected =
+                            "OhK3 S-u5c6c4e2s2s  4"
+
+                        actual =
+                            "Ok (Success.>"
+                    in
+                        highlightEqual expected actual
+                            |> Expect.equal Nothing
+            ]
+        , test "strings containing floating point numbers" <|
+            \() ->
+                let
+                    expected =
+                        "1.6"
+
+                    actual =
+                        "16"
+                in
+                    highlightEqual expected actual
+                        |> Expect.equal Nothing
+        ]
+    , describe "strings that should be highlighted"
+        [ test "similar strings" <|
+            \() ->
+                let
+                    expected =
+                        "Err { context = \"Success\" }"
+
+                    actual =
+                        "(Ok \"Success\""
+                in
+                    highlightEqual expected actual
+                        |> Expect.notEqual Nothing
+
+        ]
+    ]
+
+

lib/Generate.js

@@ -128,7 +128,7 @@ function generateElmJson(
   };
 
   var nodeTestRunnerElmJsonPath = path.resolve(
-    path.join(__dirname, '..', 'elm.json')
+    path.join(__dirname, '..', 'elm', 'elm.json')
   );
   var nodeTestRunnerElmJson = fs.readJsonSync(nodeTestRunnerElmJsonPath);
   // we want to use the version of elm-explorations/test that the user
@@ -208,7 +208,7 @@ function generateElmJson(
 
     // NOTE: we must include node-test-runner's Elm source as a source-directory
     // instead of adding it as a dependency so that it can include port modules
-    path.resolve(path.join(__dirname, '..', 'src')),
+    path.resolve(path.join(__dirname, '..', 'elm', 'src')),
   ].concat(sourceDirs);
 
   // When running node-test-runner's own test suite, the node-test-runner/src folder

package.json

@@ -8,7 +8,7 @@
   },
   "scripts": {
     "flow": "flow",
-    "test": "flow check && npm run prettier:check && mocha tests",
+    "test": "flow check && npm run prettier:check && mocha tests && cd elm && ../bin/elm-test",
     "prettier:check": "prettier \"lib/**/*.js\" \"tests/**/*.js\" --list-different",
     "prettier:write": "prettier \"lib/**/*.js\" \"tests/**/*.js\" --write"
   },