chore: add tests for matchers (#702)

* chore: add tests

Author: parker-snyk

test/unit/dockerPackageInstallCommand.spec.ts

@@ -0,0 +1,64 @@
+import { toBeDockerPackageInstallCommand } from "../matchers/dockerPackageInstallCommand";
+
+// Test all of the combinations of package install commands for the regex in test/matchers/dockerPackageInstallCommand.ts:11
+describe("valid package install commands", () => {
+  const testCases = [
+    { command: "rpm -i nginx", pkg: "nginx" },
+    { command: "rpm --install nginx", pkg: "nginx" },
+    { command: "apk add curl", pkg: "curl" },
+    { command: "apk --update add curl", pkg: "curl" },
+    { command: "apk -u add curl", pkg: "curl" },
+    { command: "apk --no-cache add curl", pkg: "curl" },
+    { command: "apt-get install curl", pkg: "curl" },
+    { command: "apt-get --yes install curl", pkg: "curl" },
+    { command: "apt-get -y install curl", pkg: "curl" },
+    { command: "apt install curl", pkg: "curl" },
+    { command: "yum install curl", pkg: "curl" },
+    { command: "aptitude install curl", pkg: "curl" },
+  ];
+
+  testCases.forEach(({ command, pkg }) => {
+    it(`recognizes "${command}" as valid`, () => {
+      const result = toBeDockerPackageInstallCommand(command, pkg);
+      expect(result.pass).toBe(true);
+
+      // Verify success message
+      expect(result.message()).toContain("not to be a package installCommand");
+    });
+  });
+});
+
+describe("invalid package install commands", () => {
+  const testCases = [
+    {
+      command: "not a command",
+      pkg: "curl",
+      reason: "not a package manager command",
+    },
+    {
+      command: "apt-get install vim",
+      pkg: "curl",
+      reason: "wrong package name",
+    },
+    {
+      command: "RUN apt-get install curl",
+      pkg: "curl",
+      reason: "prefixed with RUN",
+    },
+    {
+      command: "RUN /bin/sh -c apt-get install curl",
+      pkg: "curl",
+      reason: "RUN with shell",
+    },
+  ];
+
+  testCases.forEach(({ command, pkg, reason }) => {
+    it(`rejects "${command}" - ${reason}`, () => {
+      const result = toBeDockerPackageInstallCommand(command, pkg);
+      expect(result.pass).toBe(false);
+
+      // Verify failure message
+      expect(result.message()).toContain("to be a package installCommand");
+    });
+  });
+});