build: move main.zig to example.zig (#8)

* build: move main.zig to example.zig

* use default optimize for tests

.github/workflows/check.yml

@@ -43,4 +43,4 @@ jobs:
             ${{ runner.os }}-zig-build-
 
       - name: Unit testing
-        run: zig build test --summary all
+        run: zig build test

build.zig

@@ -68,61 +68,26 @@ pub fn build(b: *std.Build) !void {
 
     b.installArtifact(libsecp256k1);
 
-    const exe = b.addExecutable(.{
-        .name = "libsecp256k1-zig",
-        .root_source_file = b.path("src/main.zig"),
-        .target = target,
-        .optimize = optimize,
-        .link_libc = true,
-    });
-    exe.addIncludePath(libsecp_c.path(""));
-    exe.addIncludePath(libsecp_c.path("src"));
-
-    exe.root_module.addImport("secp256k1", module);
-    exe.root_module.linkLibrary(libsecp256k1);
-
-    // This declares intent for the executable to be installed into the
-    // standard location when the user invokes the "install" step (the default
-    // step when running `zig build`).
-    b.installArtifact(exe);
-
-    // This *creates* a Run step in the build graph, to be executed when another
-    // step is evaluated that depends on it. The next line below will establish
-    // such a dependency.
-    const run_cmd = b.addRunArtifact(exe);
-
-    // By making the run step depend on the install step, it will be run from the
-    // installation directory rather than directly from within the cache directory.
-    // This is not necessary, however, if the application depends on other installed
-    // files, this ensures they will be present and in the expected location.
-    run_cmd.step.dependOn(b.getInstallStep());
-
-    // This allows the user to pass arguments to the application in the build
-    // command itself, like this: `zig build run -- arg1 arg2 etc`
-    if (b.args) |args| {
-        run_cmd.addArgs(args);
-    }
-
-    // This creates a build step. It will be visible in the `zig build --help` menu,
-    // and can be selected like this: `zig build run`
-    // This will evaluate the `run` step rather than the default, which is "install".
-    const run_step = b.step("run", "Run the app");
-    run_step.dependOn(&run_cmd.step);
-
     // Creates a step for unit testing. This only builds the test executable
     // but does not run it.
     const lib_unit_tests = b.addTest(.{
         .root_source_file = b.path("src/secp256k1.zig"),
         .target = target,
-        .optimize = optimize,
     });
     lib_unit_tests.linkLibrary(libsecp256k1);
-
     const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
 
+    const example_tests = b.addTest(.{
+        .root_source_file = b.path("src/examples.zig"),
+        .target = target,
+    });
+    example_tests.linkLibrary(libsecp256k1);
+    const run_example_test = b.addRunArtifact(example_tests);
+
     // Similar to creating the run step earlier, this exposes a `test` step to
     // the `zig build --help` menu, providing a way for the user to request
     // running the unit tests.
-    const test_step = b.step("test", "Run unit tests");
+    const test_step = b.step("test", "Run tests");
     test_step.dependOn(&run_lib_unit_tests.step);
+    test_step.dependOn(&run_example_test.step);
 }

src/main.zig → src/examples.zig

@@ -1,8 +1,10 @@
 const std = @import("std");
-const secp256k1 = @import("secp256k1");
+const secp256k1 = @import("./secp256k1.zig");
+
 const Sha256 = std.crypto.hash.sha2.Sha256;
 const rand = std.crypto.random;
-pub fn generateKeypair() !void {
+
+test "generateKeypair" {
     const secp = try secp256k1.Secp256k1.genNew();
     defer secp.deinit();
 
@@ -19,7 +21,7 @@ pub fn generateKeypair() !void {
     }
 }
 
-pub fn signAndVerifyEcdsa() !void {
+test "signAndVerifyEcdsa" {
     const secp = try secp256k1.Secp256k1.genNew();
     defer secp.deinit();
 
@@ -33,12 +35,3 @@ pub fn signAndVerifyEcdsa() !void {
     const signature = try secp.signEcdsa(seckey, messageHash[0..32].*);
     try secp.verifyEcdsa(signature, messageHash[0..32].*, pubkey);
 }
-
-pub fn main() !void {
-
-    // generate key pair example
-    try generateKeypair();
-
-    // ecdsa example
-    try signAndVerifyEcdsa();
-}