Adding logic to filter by vulnerability severity.

__tests__/config.test.ts

@@ -11,7 +11,7 @@ test('has a default config filepath', async () => {
     expect(true).toEqual(true)
 })
 
-test('can read files with both extensions', async () => {
+test('the default config path handles .yml and .yaml', async () => {
     expect(true).toEqual(true)
 })
 

__tests__/filter.test.ts

@@ -0,0 +1,54 @@
+import { expect, test } from '@jest/globals'
+import { Change, Changes } from '../src/schemas'
+import { filterChangesBySeverity } from '../src/filter'
+
+let npmChange: Change = {
+    manifest: "package.json",
+    change_type: "added",
+    ecosystem: "npm",
+    name: "Reeuhq",
+    version: "1.0.2",
+    package_url: "somepurl",
+    license: "MIT",
+    source_repository_url: "github.com/some-repo",
+    vulnerabilities: [
+        {
+            severity: "critical",
+            advisory_ghsa_id: "first-random_string",
+            advisory_summary: "very dangerouns",
+            advisory_url: "github.com/future-funk"
+        }
+    ]
+}
+
+let rubyChange: Change = {
+    change_type: "added",
+    manifest: "Gemfile.lock",
+    ecosystem: "rubygems",
+    name: "actionsomething",
+    version: "3.2.0",
+    package_url: "somerubypurl",
+    license: "BSD",
+    source_repository_url: "github.com/some-repo",
+    vulnerabilities: [
+        {
+            severity: "moderate",
+            advisory_ghsa_id: "second-random_string",
+            advisory_summary: "not so dangerouns",
+            advisory_url: "github.com/future-funk"
+        },
+        {
+            severity: "low",
+            advisory_ghsa_id: "third-random_string",
+            advisory_summary: "dont page me",
+            advisory_url: "github.com/future-funk"
+        },
+    ]
+}
+
+test('it properly filters changes by severity', async () => {
+    let changes: Changes = [npmChange, rubyChange]
+    const expectedChanges: Changes = [npmChange]
+    changes = filterChangesBySeverity('high', changes)
+    expect(changes).toEqual(expectedChanges)
+})