Merge pull request #25732 from dkurt:opencv_js_tests_update

Fix OpenCV.js tests #25732

### Pull Request Readiness Checklist

* Firefox tests passed

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

modules/js/test/init_cv.js

@@ -0,0 +1,14 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+if (cv instanceof Promise) {
+    QUnit.test("init_cv", (assert) => {
+        const done = assert.async();
+        assert.ok(true);
+        cv.then((ready_cv) => {
+            cv = ready_cv;
+            done();
+        });
+    });
+}

modules/js/test/test_calib3d.js

@@ -2,11 +2,6 @@
 // It is subject to the license terms in the LICENSE file found in the top-level directory
 // of this distribution and at http://opencv.org/license.html.
 
-if (typeof module !== 'undefined' && module.exports) {
-  // The environment is Node.js
-  var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 QUnit.module('Camera Calibration and 3D Reconstruction', {});
 
 QUnit.test('constants', function(assert) {

modules/js/test/test_core.js

@@ -2,11 +2,6 @@
 // It is subject to the license terms in the LICENSE file found in the top-level directory
 // of this distribution and at http://opencv.org/license.html.
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 QUnit.module('Core', {});
 
 QUnit.test('test_LUT', function(assert) {

modules/js/test/test_features2d.js

@@ -2,11 +2,6 @@
 // It is subject to the license terms in the LICENSE file found in the top-level directory
 // of this distribution and at http://opencv.org/license.html.
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 function generateTestFrame(width, height) {
   let w = width || 200;
   let h = height || 200;

modules/js/test/test_imgproc.js

@@ -68,11 +68,6 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 QUnit.module('Image Processing', {});
 
 QUnit.test('test_imgProc', function(assert) {

modules/js/test/test_mat.js

@@ -68,11 +68,6 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 QUnit.module('CoreMat', {});
 
 QUnit.test('test_mat_creation', function(assert) {

modules/js/test/test_objdetect.js

@@ -68,11 +68,11 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 
+var haarcascade_data = undefined;
 if (typeof module !== 'undefined' && module.exports) {
     // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
+    let fs = require("fs");
-    cv.FS_createLazyFile('/', 'haarcascade_frontalface_default.xml', // eslint-disable-line new-cap
+    haarcascade_data = fs.readFileSync("haarcascade_frontalface_default.xml");
-                         'haarcascade_frontalface_default.xml', true, false);
 }
 
 QUnit.module('Object Detection', {});
@@ -99,6 +99,10 @@ QUnit.test('Cascade classification', function(assert) {
 
     // CascadeClassifier
     {
+        if (haarcascade_data) {
+            cv.FS_createDataFile("/", "haarcascade_frontalface_default.xml", haarcascade_data, true, false, false);
+        }
+
         let classifier = new cv.CascadeClassifier();
         const modelPath = '/haarcascade_frontalface_default.xml';
 

modules/js/test/test_photo.js

@@ -40,12 +40,6 @@
 
 // Author : Rijubrata Bhaumik, Intel Corporation. rijubrata.bhaumik[at]intel[dot]com
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
-
 QUnit.module('Photo', {});
 
 QUnit.test('test_photo', function(assert) {

modules/js/test/test_utils.js

@@ -67,10 +67,6 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
 QUnit.module('Utils', {});
 QUnit.test('Test vectors', function(assert) {
     {

modules/js/test/test_video.js

@@ -67,11 +67,6 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 
-if (typeof module !== 'undefined' && module.exports) {
-    // The environment is Node.js
-    var cv = require('./opencv.js'); // eslint-disable-line no-var
-}
-
 QUnit.module('Video', {});
 QUnit.test('Background Segmentation', function(assert) {
     // BackgroundSubtractorMOG2

modules/js/test/tests.js

@@ -43,8 +43,9 @@ testrunner.options.maxBlockDuration = 20000; // cause opencv_js.js need time to
 
 testrunner.run(
     {
-        code: 'opencv.js',
+        code: {path: "opencv.js", namespace: "cv"},
-        tests: ['test_mat.js',
+        tests: ['init_cv.js',
+                'test_mat.js',
                 'test_utils.js',
                 'test_core.js',
                 'test_imgproc.js',
@@ -57,7 +58,10 @@ testrunner.run(
     },
     function(err, report) {
         console.log(report.failed + ' failed, ' + report.passed + ' passed');
-        if (report.failed) {
+        if (report.failed || err) {
+            if (err) {
+                console.log(err);
+            }
             process.on('exit', function() {
                 process.exit(1);
             });

platforms/js/build_js.py

@@ -192,7 +192,7 @@ class Builder:
         if self.options.simd:
             flags += "-msimd128 "
         if self.options.build_flags:
-            flags += self.options.build_flags
+            flags += self.options.build_flags + " "
         if self.options.webnn:
             flags += "-s USE_WEBNN=1 "
         flags += "-s EXPORTED_FUNCTIONS=\"['_malloc', '_free']\""