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Added tests for exif-helper

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This commit is contained in:
Christoph Oberhofer
2016-08-15 00:51:31 +02:00
parent 6d5fd9d7ac
commit ce4d4a976a
5 changed files with 103 additions and 11 deletions
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.eslintrc
+6 -1
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@@ -24,7 +24,12 @@
"objectLiteralComputedProperties": true "objectLiteralComputedProperties": true
}, },
"globals": { "globals": {
"ENV": true "ENV": true,
"beforeEach": true,
"describe": true,
"it": true,
"expect": true,
"sinon": true
}, },
"rules": { "rules": {
"no-unused-expressions": 1, "no-unused-expressions": 1,
dist/quagga.js
Vendored
+19 -5
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File diff suppressed because one or more lines are too long
dist/quagga.min.js
Vendored
+1 -1
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File diff suppressed because one or more lines are too long
src/input/exif_helper.js
+18 -4
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@@ -12,6 +12,19 @@ export function findTagsInObjectURL(src, tags = AvailableTags) {
return Promise.resolve(null); 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) { function readToBuffer(blob) {
return new Promise(resolve => { return new Promise(resolve => {
const fileReader = new FileReader(); const fileReader = new FileReader();
@@ -23,20 +36,21 @@ function readToBuffer(blob) {
} }
function objectURLToBlob(url) { function objectURLToBlob(url) {
return new Promise(resolve => { return new Promise((resolve, reject) => {
const http = new XMLHttpRequest(); const http = new XMLHttpRequest();
http.open("GET", url, true); http.open("GET", url, true);
http.responseType = "blob"; http.responseType = "blob";
http.onload = function() { http.onreadystatechange = function () {
if (this.status === 200 || this.status === 0) { if (http.readyState === XMLHttpRequest.DONE && (http.status === 200 || http.status === 0)) {
resolve(this.response); resolve(this.response);
} }
}; };
http.onerror = reject;
http.send(); http.send();
}); });
} }
function findTagsInBuffer(file, selectedTags = AvailableTags) { export function findTagsInBuffer(file, selectedTags = AvailableTags) {
const dataView = new DataView(file), const dataView = new DataView(file),
length = file.byteLength, length = file.byteLength,
exifTags = selectedTags.reduce((result, selectedTag) => { exifTags = selectedTags.reduce((result, selectedTag) => {
test/spec/exif_helper.spec.js
+59
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@@ -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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',
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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({});
});
});
});