Mike Gerwitz

Activist for User Freedom

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authorMike Gerwitz <mike.gerwitz@rtspecialty.com>2019-09-17 15:22:52 -0400
committerMike Gerwitz <mike.gerwitz@rtspecialty.com>2019-10-18 09:55:09 -0400
commitfe105789498377b49e409b30c3e17f152750fed1 (patch)
tree76abb5f0e5f81f398cfd4be65ce8e50bd8b60424 /test/error
parent1f66a25658e32706b6fb6e80421f7f951475369a (diff)
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{Context,Chained}Error: New modules
This will allow us to provide additional useful information for structure logging.
Diffstat (limited to 'test/error')
-rw-r--r--test/error/ChainedErrorTest.ts67
-rw-r--r--test/error/ContextErrorTest.ts68
2 files changed, 135 insertions, 0 deletions
diff --git a/test/error/ChainedErrorTest.ts b/test/error/ChainedErrorTest.ts
new file mode 100644
index 0000000..d6d98ed
--- /dev/null
+++ b/test/error/ChainedErrorTest.ts
@@ -0,0 +1,67 @@
+/**
+ * Tests error chaining
+ *
+ * Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ * This file is part of the Liza Data Collection Framework.
+ *
+ * liza is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import * as sut from "../../src/error/ChainedError";
+import { expect } from 'chai';
+
+
+describe( 'ChainedError', () =>
+{
+ it( "can be created with generic error", () =>
+ {
+ const eprev = new Error( "previous error" );
+
+ expect( sut.chain( new Error( "new error" ), eprev ).chain )
+ .to.equal( eprev );
+ } );
+
+
+ it( "can be chained to arbitrary depth", () =>
+ {
+ const e1 = new Error( "lower" );
+ const e2 = sut.chain( new Error( "mid" ), e1 );
+ const e3 = sut.chain( new Error( "outer" ), e2 );
+
+ expect( sut.isChained( e3 ) ).to.be.true;
+ expect( sut.isChained( e2 ) ).to.be.true;
+ expect( sut.isChained( e1 ) ).to.be.false;
+ } );
+
+
+ it( "provides type predicate for TypeScript", () =>
+ {
+ const inner = new Error( "inner" );
+
+ // force to Error to discard ChainedError type
+ const outer: Error = sut.chain( new Error( "outer" ), inner );
+
+ if ( sut.isChained( outer ) )
+ {
+ // if isChained was properly defined, then outer should now
+ // have type ChainedError, and so this should compile
+ expect( outer.chain ).to.equal( inner );
+ }
+ else
+ {
+ expect.fail();
+ }
+ } );
+} );
diff --git a/test/error/ContextErrorTest.ts b/test/error/ContextErrorTest.ts
new file mode 100644
index 0000000..c02c3f2
--- /dev/null
+++ b/test/error/ContextErrorTest.ts
@@ -0,0 +1,68 @@
+/**
+ * Tests error context
+ *
+ * Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ * This file is part of the Liza Data Collection Framework.
+ *
+ * liza is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import * as sut from "../../src/error/ContextError";
+import { expect } from 'chai';
+
+
+describe( 'ContextError', () =>
+{
+ it( "can be created with generic error", () =>
+ {
+ const context = { foo: "context" };
+
+ expect( sut.context( new Error( "test error" ), context ).context )
+ .to.equal( context );
+ } );
+
+
+ it( "provides type predicate for TypeScript", () =>
+ {
+ const context = { bar: "baz context" };
+
+ // force to Error to discard ContextError type
+ const e: Error = sut.context( new Error( "test error" ), context );
+
+ if ( sut.hasContext( e ) )
+ {
+ // if isChained was properly defined, then outer should now
+ // have type ChainedError, and so this should compile
+ expect( e.context ).to.equal( context );
+ }
+ else
+ {
+ expect.fail();
+ }
+ } );
+
+
+ it( "can create typed contexts", () =>
+ {
+ type FooErrorContext = { foo: string };
+
+ // this is the actual test
+ const e: sut.ContextError<FooErrorContext> =
+ sut.context( new Error( "test error" ), { foo: "context" } );
+
+ // contravariance check (would fail to compile)
+ expect( sut.hasContext( e ) ).to.be.true;
+ } );
+} );