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104 lines
3.3 KiB
TypeScript
104 lines
3.3 KiB
TypeScript
// <snippet name="image-source">
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// # Image source
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// Using the image source requires the image-source module.
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// ``` JavaScript
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//var imageSource = require("image-source");
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// ```
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// The pre-required `imageSource` module is used throughout the following code snippets.
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// We also use fs module defined as follows:
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// ``` JavaScript
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//var fs = require("file-system");
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// ```
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// ## Loading and saving images
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// </snippet>
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import imageSource = require("image-source/image-source");
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import fs = require("file-system/file-system");
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import app = require("application/application");
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import TKUnit = require("Tests/TKUnit");
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export var testFromResource = function () {
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// <snippet name="image-source">
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// ### Load image using resource name
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// This is similar to loading Bitmap from `R.drawable.logo` on Android or calling `[UIImage imageNamed@"logo"]` on iOS
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// ``` JavaScript
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var img = imageSource.fromResource("logo");
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// ```
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// </snippet>
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TKUnit.assert(img.height > 0, "image.fromResource failed");
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}
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export var testFromUrl = function () {
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var completed;
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var result: imageSource.ImageSource;
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// <snippet name="image-source">
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// ### Load image from URL
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// ``` JavaScript
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imageSource.fromUrl("http://www.google.com/images/errors/logo_sm_2.png")
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.then(function (res: imageSource.ImageSource) {
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//console.log("Image successfully loaded");
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// <hide>
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completed = true;
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result = res;
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// </hide>
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})
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.fail(function (error) {
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//console.log("Error loading image: " + error);
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// <hide>
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completed = true;
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// </hide>
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});
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// ```
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// </snippet>
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var isReady = function () {
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return completed;
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}
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TKUnit.waitUntilReady(isReady, 3);
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TKUnit.assert(typeof result !== "undefined", "Image not downloaded");
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TKUnit.assert(result.height > 0, "Image not downloaded");
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}
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export var testSaveToFile = function () {
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// <snippet name="image-source">
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// ### Save image source to PNG or JPG file
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// ``` JavaScript
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var img = imageSource.fromResource("logo");
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var folder = fs.knownFolders.documents();
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var path = fs.path.join(folder.path, "Test.png");
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var saved = img.saveToFile(path, imageSource.ImageFormat.PNG);
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// ```
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// </snippet>
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TKUnit.assert(saved, "Image not saved to file");
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TKUnit.assert(fs.File.exists(path), "Image not saved to file");
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}
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export var testFromFile = function () {
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// <snippet name="image-source">
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// ### Load image from a local file
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// ``` JavaScript
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var folder = fs.knownFolders.documents();
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var path = fs.path.join(folder.path, "Test.png");
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var img = imageSource.fromFile(path);
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// ```
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// </snippet>
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TKUnit.assert(img.height > 0, "image.fromResource failed");
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// remove the image from the file system
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var file = folder.getFile("Test.png");
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file.remove();
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TKUnit.assert(!fs.File.exists(path), "Test.png not removed");
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}
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export var testNativeFields = function () {
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var img = imageSource.fromResource("logo");
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if (app.android) {
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TKUnit.assert(img.android != null, "Image.android not updated.");
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} else if (app.ios) {
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TKUnit.assert(img.ios != null, "Image.ios not updated.");
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}
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}
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