import * as assert from 'assert';
import { BuiltInCompletion } from '../../providers/completions/BuiltInCompletion';
import { SnippetCompletion } from '../../providers/completions/SnippetCompletion';

suite('Completion Provider Test Suite', () => {
    test('BuiltInCompletion: Reagiert auf "log."', () => {
        const strategy = new BuiltInCompletion();
        // Wir faken Document und Position, da wir nur linePrefix brauchen
        const result = strategy.provideCompletions(null as any, null as any, '    log.');
        
        assert.ok(result !== undefined);
        assert.strictEqual(result.length, 4); // debug, info, warn, error
        assert.strictEqual(result[0].label, 'debug');
    });

    test('BuiltInCompletion: Ignoriert normalen Text', () => {
        const strategy = new BuiltInCompletion();
        const result = strategy.provideCompletions(null as any, null as any, '    my_var');
        
        assert.strictEqual(result, undefined);
    });

    test('SnippetCompletion: Liefert Snippets für normalen Text', () => {
        const strategy = new SnippetCompletion();
        const result = strategy.provideCompletions(null as any, null as any, '    i');
        
        assert.ok(result !== undefined);
        const hasIf = result.some(item => item.label === 'if');
        assert.ok(hasIf, "Muss 'if' Snippet vorschlagen");
    });

    test('SnippetCompletion: Blockiert Snippets nach Punkt', () => {
        const strategy = new SnippetCompletion();
        const result = strategy.provideCompletions(null as any, null as any, '    discovery.r');
        
        assert.strictEqual(result, undefined, "Darf keine Block-Snippets in Namespaces anzeigen");
    });
});