4 files changed, 53 insertions, 0 deletions
diff --git a/lambda-calcul/javascript/test/client.test.js b/lambda-calcul/javascript/test/client.test.js
index 5fcc42c..8b68a61 100644
--- a/lambda-calcul/javascript/test/client.test.js
+++ b/lambda-calcul/javascript/test/client.test.js
@@ -54,4 +54,30 @@ describe('λ-calculator', () => {
     return client.nextChallenge('SomeToken')
       .then((challenge) => expect(challenge).toBe('SomeChallenge'));
   });
+
+  it('solves challenges', () => {
+    const parser = {
+      parse: (challenge) => {
+        expect(challenge).toBe('Some challenge');
+        return 'Parsed expression';
+      },
+    };
+
+    const interpreter = {
+      evaluate: (parsedExpression) => {
+        expect(parsedExpression).toBe('Parsed expression');
+        return 'Evaluated expression';
+      },
+    };
+
+    const printer = {
+      print: (evaluatedExpression) => {
+        expect(evaluatedExpression).toBe('Evaluated expression');
+        return 'Expression to print';
+      },
+    };
+
+    const client = LC.newClient({ parser, interpreter, printer });
+    expect(client.solve('Some challenge')).toBe('Expression to print');
+  });
 });
diff --git a/lambda-calcul/javascript/test/interpreter.test.js b/lambda-calcul/javascript/test/interpreter.test.js
new file mode 100644
index 0000000..a859bfe
--- /dev/null
+++ b/lambda-calcul/javascript/test/interpreter.test.js
@@ -0,0 +1,9 @@
+const { σ } = require('../src/internals');
+const { evaluate } = require('../src/interpreter');
+
+describe('An interpreter', () => {
+  it('evaluates symbols', () => {
+    expect(evaluate(σ('x'))).toEqual(σ('x'));
+    expect(evaluate(σ('y'))).toEqual(σ('y'));
+  });
+});
diff --git a/lambda-calcul/javascript/test/parser.test.js b/lambda-calcul/javascript/test/parser.test.js
new file mode 100644
index 0000000..e9cab60
--- /dev/null
+++ b/lambda-calcul/javascript/test/parser.test.js
@@ -0,0 +1,9 @@
+const { σ } = require('../src/internals');
+const { parse } = require('../src/parser');
+
+describe('A parser', () => {
+  it('parses symbols', () => {
+    expect(parse('x')).toEqual(σ('x'));
+    expect(parse('y')).toEqual(σ('y'));
+  });
+});
diff --git a/lambda-calcul/javascript/test/printer.test.js b/lambda-calcul/javascript/test/printer.test.js
new file mode 100644
index 0000000..1684d31
--- /dev/null
+++ b/lambda-calcul/javascript/test/printer.test.js
@@ -0,0 +1,9 @@
+const { σ } = require('../src/internals');
+const { print } = require('../src/printer');
+
+describe('A printer', () => {
+  it('prints symbols', () => {
+    expect(print(σ('x'))).toEqual('x');
+    expect(print(σ('y'))).toEqual('y');
+  });
+});