Added tests for exif-helper

.eslintrc

@@ -24,7 +24,12 @@
         "objectLiteralComputedProperties": true
     },
     "globals": {
-        "ENV": true
+        "ENV": true,
+        "beforeEach": true,
+        "describe": true,
+        "it": true,
+        "expect": true,
+        "sinon": true
     },
     "rules": {
         "no-unused-expressions": 1,

src/input/exif_helper.js

@@ -12,6 +12,19 @@ export function findTagsInObjectURL(src, tags = AvailableTags) {
     return Promise.resolve(null);
 }
 
+export function base64ToArrayBuffer(dataUrl) {
+    const base64 = dataUrl.replace(/^data\:([^\;]+)\;base64,/gmi, ''),
+        binary = atob(base64),
+        len = binary.length,
+        buffer = new ArrayBuffer(len),
+        view = new Uint8Array(buffer);
+
+    for (let i = 0; i < len; i++) {
+        view[i] = binary.charCodeAt(i);
+    }
+    return buffer;
+}
+
 function readToBuffer(blob) {
     return new Promise(resolve => {
         const fileReader = new FileReader();
@@ -23,20 +36,21 @@ function readToBuffer(blob) {
 }
 
 function objectURLToBlob(url) {
-    return new Promise(resolve => {
+    return new Promise((resolve, reject) => {
         const http = new XMLHttpRequest();
         http.open("GET", url, true);
         http.responseType = "blob";
-        http.onload = function() {
-            if (this.status === 200 || this.status === 0) {
+        http.onreadystatechange = function () {
+            if (http.readyState === XMLHttpRequest.DONE && (http.status === 200 || http.status === 0)) {
                 resolve(this.response);
             }
         };
+        http.onerror = reject;
         http.send();
     });
 }
 
-function findTagsInBuffer(file, selectedTags = AvailableTags) {
+export function findTagsInBuffer(file, selectedTags = AvailableTags) {
     const dataView = new DataView(file),
         length = file.byteLength,
         exifTags = selectedTags.reduce((result, selectedTag) => {

test/spec/exif_helper.spec.js

@@ -0,0 +1,59 @@
+import {
+    findTagsInObjectURL,
+    findTagsInBuffer,
+    base64ToArrayBuffer
+} from '../../src/input/exif_helper';
+
+
+const fixtures = {
+    orientation: {
+        'none': 'data:image/jpeg;base64,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',
+        '6': 'data:image/jpeg;base64,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',
+        '3': 'data:image/jpeg;base64,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',
+        '8': 'data:image/jpeg;base64,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',
+        '1': 'data:image/jpeg;base64,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'
+    }
+};
+
+describe('exif_helper', () => {
+    describe("findTagsInObjectURL", () => {
+        it("should return null if the src type is not supported", (done) => {
+            findTagsInObjectURL("blabla").then(tags => {
+                expect(tags === null).to.equal(true);
+                done();
+            });
+        });
+
+        it("should fail for a invalid blob type", (done) => {
+            findTagsInObjectURL('blob:balbla')
+            .then(() => {})
+            .catch(err => {
+                console.log(err);
+                expect(typeof err !== 'undefined');
+            }).then(done);
+        });
+    });
+
+    describe("findTagsInBuffer", () => {
+        it("should result in a rotation value of 1", () => {
+            const result = findTagsInBuffer(base64ToArrayBuffer(fixtures.orientation['1']));
+            expect(result).to.deep.equal({orientation: 1});
+        });
+        it("should result in a rotation value of 6", () => {
+            const result = findTagsInBuffer(base64ToArrayBuffer(fixtures.orientation['6']));
+            expect(result).to.deep.equal({orientation: 6});
+        });
+        it("should result in a rotation value of 3", () => {
+            const result = findTagsInBuffer(base64ToArrayBuffer(fixtures.orientation['3']));
+            expect(result).to.deep.equal({orientation: 3});
+        });
+        it("should result in a rotation value of 4", () => {
+            const result = findTagsInBuffer(base64ToArrayBuffer(fixtures.orientation['8']));
+            expect(result).to.deep.equal({orientation: 8});
+        });
+        it("should return nothing if orientation is not found", () => {
+            const result = findTagsInBuffer(base64ToArrayBuffer(fixtures.orientation['none']));
+            expect(result).to.deep.equal({});
+        });
+    });
+});