add test for multi-versions

Author: SteveL-MSFT

dsc/tests/dsc_config_version.tests.ps1

@@ -56,4 +56,25 @@ Describe 'Tests for resource versioning' {
         $LASTEXITCODE | Should -Be 0 -Because (Get-Content $TestDrive/error.log -Raw)
         $out.results[0].result.actualState.version | Should -BeExactly $expected
     }
+
+    It 'Multiple versions should be handled correctly' {
+        $config_yaml = @"
+            `$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+            resources:
+            - name: Test Version 1
+              type: Test/Version
+              apiVersion: '1.1.2'
+            - name: Test Version 2
+              type: Test/Version
+              apiVersion: '1.1.0'
+            - name: Test Version 3
+              type: Test/Version
+              apiVersion: '2'
+"@
+        $out = dsc -l trace config get -i $config_yaml 2> $TestDrive/error.log | ConvertFrom-Json
+        $LASTEXITCODE | Should -Be 0 -Because (Get-Content $TestDrive/error.log -Raw)
+        $out.results[0].result.actualState.version | Should -BeExactly '1.1.2'
+        $out.results[1].result.actualState.version | Should -BeExactly '1.1.0'
+        $out.results[2].result.actualState.version | Should -BeExactly '2.0.0'
+    }
 }

dsc_lib/src/discovery/discovery_trait.rs

@@ -3,7 +3,6 @@
 
 use crate::{dscerror::DscError, extensions::dscextension::DscExtension, dscresources::dscresource::DscResource};
 use std::collections::BTreeMap;
-
 use super::command_discovery::ImportedManifest;
 
 #[derive(Debug, PartialEq)]

dsc_lib/src/discovery/mod.rs

@@ -12,7 +12,6 @@ use semver::{Version, VersionReq};
 use std::collections::BTreeMap;
 use command_discovery::{CommandDiscovery, ImportedManifest};
 use tracing::error;
-use tracing::debug;
 
 #[derive(Clone)]
 pub struct Discovery {
@@ -96,8 +95,15 @@ impl Discovery {
 
         let type_name = type_name.to_lowercase();
         if let Some(resources) = self.resources.get(&type_name) {
-            if let Some(version_string) = version_string {
-                if let Ok(version_req) = VersionReq::parse(version_string) {
+            if let Some(version) = version_string {
+                // The semver crate uses caret (meaning compatible) by default instead of exact if not specified
+                // If the first character is a number, then we prefix with =
+                let version = if version.chars().next().map_or(false, |c| c.is_ascii_digit()) {
+                    format!("={version}")
+                } else {
+                    version.to_string()
+                };
+                if let Ok(version_req) = VersionReq::parse(&version) {
                     for resource in resources {
                         if let Ok(resource_version) = Version::parse(&resource.version) {
                             if version_req.matches(&resource_version) {