feat: TestSetPrevRealm, TestSetPrevAddr

- moved test case into `gno.land/r/demo/tests`

examples/gno.land/r/demo/tests/z9_filetest.gno

@@ -0,0 +1,64 @@
+// PKGPATH: gno.land/r/set_prev_test
+package set_prev_test
+
+import (
+	"std"
+
+	"gno.land/r/demo/foo20"
+	"gno.land/r/demo/users"
+)
+
+var caller std.Address
+
+func init() {
+	caller = std.GetOrigCaller()
+	println(caller)
+}
+
+func normal_faucet() {
+	foo20.Faucet()
+	b := foo20.BalanceOf(a2u(caller))
+	println(b)
+}
+
+func set_faucet() {
+	std.TestSetPrevAddr(caller)
+
+	foo20.Faucet()
+	b := foo20.BalanceOf(a2u(caller))
+	println(b)
+}
+
+func prev_realm_addr() {
+	println(std.GetOrigCaller())
+	println(std.PrevRealm())
+
+	std.TestSetPrevRealm("gno.land/r/demo/set_prev_realm_to_this")
+	println(std.GetOrigCaller())
+	println(std.PrevRealm())
+
+	std.TestSetPrevAddr("g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5")
+	println(std.GetOrigCaller())
+	println(std.PrevRealm())
+}
+
+func main() {
+	normal_faucet()
+	set_faucet()
+	prev_realm_addr()
+}
+
+func a2u(addr std.Address) users.AddressOrName {
+	return users.AddressOrName(addr)
+}
+
+// Output:
+// g1wymu47drhr0kuq2098m792lytgtj2nyx77yrsm
+// 0
+// 10000000
+// g1wymu47drhr0kuq2098m792lytgtj2nyx77yrsm
+// struct{("g1wymu47drhr0kuq2098m792lytgtj2nyx77yrsm" std.Address),("" string)}
+// g1wymu47drhr0kuq2098m792lytgtj2nyx77yrsm
+// struct{("g1felpzysry9ac8qx2acm6ev7u94rme2uyqzjh9z" std.Address),("gno.land/r/demo/set_prev_realm_to_this" string)}
+// g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5
+// struct{("g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5" std.Address),("" string)}

gnovm/tests/imports.go

@@ -620,6 +620,65 @@ func testPackageInjector(store gno.Store, pn *gno.PackageNode) {
 				m.Context = ctx
 			},
 		)
+		pn.DefineNative("TestSetPrevRealm",
+			gno.Flds( // params
+				"", "string",
+			),
+			gno.Flds( // results
+			),
+			func(m *gno.Machine) {
+				arg0 := m.LastBlock().GetParams1().TV
+				realm := arg0.GetString()
+
+				// set pkgPath
+				for i := m.NumFrames() - 1; i > 0; i-- {
+					fr := m.Frames[i]
+
+					if i != 2 {
+						fr.LastPackage = &gno.PackageValue{
+							PkgPath: realm,
+						}
+						m.Frames[i] = fr
+					}
+				}
+			},
+		)
+		pn.DefineNative("TestSetPrevAddr",
+			gno.Flds( // params
+				"", "Address",
+			),
+			gno.Flds( // results
+			),
+			func(m *gno.Machine) {
+				arg0 := m.LastBlock().GetParams1().TV
+				addr := arg0.GetString()
+
+				// overwrite context // TestSetOrigCaller
+				ctx := m.Context.(stdlibs.ExecContext)
+				ctx.OrigCaller = crypto.Bech32Address(addr)
+				m.Context = ctx
+
+				// Set PkgPath
+				lastPkgPath := ""
+				for i := m.NumFrames() - 1; i > 0; i-- {
+					fr := m.Frames[i]
+					if fr.LastPackage == nil || !fr.LastPackage.IsRealm() {
+						// Ignore non-realm frame
+						continue
+					}
+
+					pkgPath := fr.LastPackage.PkgPath
+					if lastPkgPath == "" {
+						lastPkgPath = pkgPath
+					}
+
+					fr.LastPackage = &gno.PackageValue{
+						PkgPath: "",
+					}
+					m.Frames[i] = fr
+				}
+			},
+		)
 		pn.DefineNative("TestIssueCoins",
 			gno.Flds( // params
 				"addr", "Address",