diff --git a/build/jasmine/matchers.js b/build/jasmine/matchers.js
new file mode 100644
index 0000000..f5c4bf3
--- /dev/null
+++ b/build/jasmine/matchers.js
@@ -0,0 +1,72 @@
+function toBeTextNode() {
+  return {
+    compare(actual) {
+      const pass = actual.nodeType === 3;
+      const message = pass
+        ? `Expected node to be a text node`
+        : `Expected node not to be a text node`;
+
+      return { pass, message };
+    }
+  };
+}
+
+function toBeElementNode() {
+  return {
+    compare(actual) {
+      const pass = actual.nodeType === 1;
+      const message = pass
+        ? `Expected node to be a element node`
+        : `Expected node not to be a element node`;
+
+      return { pass, message };
+    }
+  };
+}
+
+function toBeTag() {
+  return {
+    compare(actual, expected) {
+      if (actual.nodeType !== 1) {
+        return { pass: false, message: "Expected element node" };
+      }
+
+      const expectedTag = expected.toLowerCase();
+      const actualTag = actual.tagName.toLowerCase();
+      const pass = actualTag === expectedTag;
+      const message = pass
+        ? `Expected to be a "${expectedTag}" but it a "${actualTag}"`
+        : `Expected not to be a "${expectedTag}"`;
+
+      return { pass, message };
+    }
+  };
+}
+
+function toHaveText() {
+  return {
+    compare(actual, expected) {
+      if (actual.nodeType !== 1 && actual.nodeType !== 3) {
+        return { pass: false, message: "Expected text or element node" };
+      }
+
+      const expectedText = expected.trim();
+      const actualText = actual.nodeType === 1
+        ? actual.textContent.trim()
+        : actual.wholeText.trim();
+      const pass = actualText === expected;
+      const message = pass
+        ? `Expected node to have "${expectedText}" but have "${actualText}"`
+        : `Expected node not to have "${expectedText}"`;
+
+      return { pass, message };
+    }
+  };
+}
+
+jasmine.Expectation.addCoreMatchers({
+  toBeTextNode,
+  toBeElementNode,
+  toBeTag,
+  toHaveText
+});
diff --git a/build/karma/base.js b/build/karma/base.js
index c1f2526..093f418 100644
--- a/build/karma/base.js
+++ b/build/karma/base.js
@@ -8,6 +8,10 @@ module.exports = {
   frameworks: ["jasmine"],
 
   files: [
+    {
+      pattern: "build/jasmine/matchers.js",
+      watched: process.env.CI !== "true"
+    },
     {
       pattern: "build/jasmine/setup.js",
       watched: process.env.CI !== "true"
@@ -32,6 +36,7 @@ module.exports = {
   ],
 
   preprocessors: {
+    "build/jasmine/matchers.js": ["rollup"],
     "build/jasmine/setup.js": ["rollup"],
     "build/jasmine/fixtures.js": ["rollup"],
     "build/jasmine/helpers.js": ["rollup"],