Use SurveyDesign! for mutable operations

This commit updates the usage of `SurveyDesign` to `SurveyDesign!` in various instances within the test suite. The change reflects the need for mutable operations on the survey design objects, aligning with the Julia convention of using the bang symbol (!) to indicate functions that modify their arguments in place. This adjustment ensures that the test suite correctly utilizes the API for creating and modifying survey designs, particularly in the context of applying bootstrap and jackknife weights, as well as handling different sampling strategies such as simple random sampling, stratified sampling, and cluster sampling. The update is critical for maintaining the integrity and accuracy of the survey analysis tests.

test/runtests.jl

@@ -12,7 +12,7 @@ REPLICATES_REGEX = r"r*_\d"
 
 # Simple random sample
 apisrs = load_data("apisrs") # Load API dataset
-srs = SurveyDesign(apisrs, weights=:pw)
+srs = SurveyDesign!(apisrs, weights=:pw)
 unitrange = UnitRange((length(names(apisrs))+1):(TOTAL_REPLICATES+length(names(apisrs))))
 bsrs = srs |> bootweights # Create bootstrap replicate design
 jsrs = srs |> jackknifeweights # Create jackknife replicate design
@@ -22,7 +22,7 @@ bsrs_regex = ReplicateDesign{BootstrapReplicates}(bsrs.data, REPLICATES_REGEX, w
 
 # Stratified sample
 apistrat = load_data("apistrat") # Load API dataset
-dstrat = SurveyDesign(apistrat, strata=:stype, weights=:pw) # Create SurveyDesign
+dstrat = SurveyDesign!(apistrat, strata=:stype, weights=:pw) # Create SurveyDesign
 unitrange = UnitRange((length(names(apistrat))+1):(TOTAL_REPLICATES+length(names(apistrat))))
 bstrat = dstrat |> bootweights # Create replicate design
 bstrat_direct = ReplicateDesign{BootstrapReplicates}(bstrat.data, REPLICATES_VECTOR, strata=:stype, weights=:pw)  # using ReplicateDesign constructor
@@ -32,7 +32,7 @@ bstrat_regex = ReplicateDesign{BootstrapReplicates}(bstrat.data, REPLICATES_REGE
 # One-stage cluster sample
 apiclus1 = load_data("apiclus1") # Load API dataset
 apiclus1[!, :pw] = fill(757 / 15, (size(apiclus1, 1),)) # Correct api mistake for pw column
-dclus1 = SurveyDesign(apiclus1; clusters=:dnum, weights=:pw) # Create SurveyDesign
+dclus1 = SurveyDesign!(apiclus1; clusters=:dnum, weights=:pw) # Create SurveyDesign
 unitrange = UnitRange((length(names(apiclus1))+1):(TOTAL_REPLICATES+length(names(apiclus1))))
 dclus1_boot = dclus1 |> bootweights # Create replicate design
 dclus1_boot_direct = ReplicateDesign{BootstrapReplicates}(dclus1_boot.data, REPLICATES_VECTOR, clusters=:dnum, weights=:pw)  # using ReplicateDesign constructor
@@ -41,14 +41,14 @@ dclus1_boot_regex = ReplicateDesign{BootstrapReplicates}(dclus1_boot.data, REPLI
 
 # Two-stage cluster sample
 apiclus2 = load_data("apiclus2") # Load API dataset
-dclus2 = SurveyDesign(apiclus2; clusters=:dnum, weights=:pw) # Create SurveyDesign
+dclus2 = SurveyDesign!(apiclus2; clusters=:dnum, weights=:pw) # Create SurveyDesign
 dclus2_boot = dclus2 |> bootweights # Create replicate design
 
 # NHANES
 nhanes = load_data("nhanes")
 nhanes.seq1 = collect(1.0:5.0:42955.0)
 nhanes.seq2 = collect(1.0:9.0:77319.0) # [9k for k in 0:8590.0]
-dnhanes = SurveyDesign(nhanes; clusters=:SDMVPSU, strata=:SDMVSTRA, weights=:WTMEC2YR)
+dnhanes = SurveyDesign!(nhanes; clusters=:SDMVPSU, strata=:SDMVSTRA, weights=:WTMEC2YR)
 dnhanes_boot = dnhanes |> bootweights
 
 @testset "Survey.jl" begin