chore(test): expand browser test coverage

- expand browser list to be tested
- update karma configuration for newly added rx.dom test cases

closes #998

Author: kwonoj

karma.conf.js

@@ -7,7 +7,7 @@ module.exports = function (config) {
     sl_chrome: {
       base: 'SauceLabs',
       browserName: 'chrome',
-      version: '47'
+      version: '46'
     },
     sl_chrome_beta: {
       base: 'SauceLabs',
@@ -34,18 +34,90 @@ module.exports = function (config) {
       browserName: 'firefox',
       version: 'dev'
     },
+    sl_safari7: {
+      base: 'SauceLabs',
+      browserName: 'safari',
+      platform: 'OS X 10.9',
+      version: '7'
+    },
+    sl_safari8: {
+      base: 'SauceLabs',
+      browserName: 'safari',
+      platform: 'OS X 10.10',
+      version: '8'
+    },
     sl_safari9: {
       base: 'SauceLabs',
       browserName: 'safari',
       platform: 'OS X 10.11',
       version: '9.0'
     },
+    sl_ios7: {
+      base: 'SauceLabs',
+      browserName: 'iphone',
+      platform: 'OS X 10.10',
+      version: '7.1'
+    },
+    sl_ios8: {
+      base: 'SauceLabs',
+      browserName: 'iphone',
+      platform: 'OS X 10.10',
+      version: '8.4'
+    },
     sl_ios9: {
       base: 'SauceLabs',
       browserName: 'iphone',
       platform: 'OS X 10.10',
       version: '9.1'
     },
+    sl_ie9: {
+      base: 'SauceLabs',
+      browserName: 'internet explorer',
+      platform: 'Windows 2008',
+      version: '9'
+    },
+    sl_ie10: {
+      base: 'SauceLabs',
+      browserName: 'internet explorer',
+      platform: 'Windows 2012',
+      version: '10'
+    },
+    sl_ie11: {
+      base: 'SauceLabs',
+      browserName: 'internet explorer',
+      platform: 'Windows 8.1',
+      version: '11'
+    },
+    sl_edge: {
+      base: 'SauceLabs',
+      browserName: 'microsoftedge',
+      platform: 'Windows 10',
+      version: '20.10240'
+    },
+    sl_android_4_1: {
+      base: 'SauceLabs',
+      browserName: 'android',
+      platform: 'Linux',
+      version: '4.1'
+    },
+    sl_android_4_2: {
+      base: 'SauceLabs',
+      browserName: 'android',
+      platform: 'Linux',
+      version: '4.2'
+    },
+    sl_android_4_3: {
+      base: 'SauceLabs',
+      browserName: 'android',
+      platform: 'Linux',
+      version: '4.3'
+    },
+    sl_android_4_4: {
+      base: 'SauceLabs',
+      browserName: 'android',
+      platform: 'Linux',
+      version: '4.4'
+    },
     sl_android5: {
       base: 'SauceLabs',
       browserName: 'android',
@@ -67,6 +139,7 @@ module.exports = function (config) {
     files: [
       'spec/helpers/marble-testing.js',
       'spec/helpers/test-helper.js',
+      'spec/helpers/ajax-helper.js',
       'spec/**/*-spec.js'
     ],